Java中MySQL事务处理举例

实例（以sql语句中的insert语句为例）

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 事务的基本用法
 *
 */
public class Test
{
    public static void main(String[] args)
    {
        Connection conn = null;
        PreparedStatement ps1 = null;
        PreparedStatement ps2 = null;

        try
        {
            //加载驱动类
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/testjdbc","root","123456");

            conn.setAutoCommit(false); //JDBC中默认是true，我们改成false，然后在后面手动提交

            ps1 = conn.prepareStatement("insert into t_user (username,pwd) values (?,?)");//?是占位符
            ps1.setObject(1, "张三");
            ps1.setObject(2, "666666");
            ps1.execute();
            System.out.println("插入一个用户张三");

            try
            {
                Thread.sleep(3000);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }

            ps2 = conn.prepareStatement("insert into t_user (username,pwd) values (?,?)");
            ps2.setObject(1, "李四");
            ps2.setObject(2, "123456");
            ps2.execute();
            System.out.println("插入一个用户李四");

            conn.commit();//提交事务
         }
         catch (ClassNotFoundException e)
         {
            e.printStackTrace();
            try
            {
                conn.rollback();//某一条数据添加失败时，回滚
            }
            catch (SQLException e1)
            {
                e1.printStackTrace();
            }
        }
        catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                if(ps1!=null)
                {
                    ps1.close();
                }
            }
            catch (SQLException e)
            {
                e.printStackTrace();
            }
            try
            {
                if(conn!=null)
                {
                    conn.close();
                }
            }
            catch (SQLException e)
            {
                e.printStackTrace();
            }
        }
    }
}